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NDA-24300 CHAPTER 5
Page 361
Issue 1
FAULT REPAIR PROCEDURES
6.3 Control System Fault - STBY Side Is Faulty
Faulty Situation:
• Fault has occurred in the STBY side of dual configuration system.
• [0-I] STBY CPU Failure
• The ACT side has become faulty, and system changeover has executed.
• [0-C], [0-H], [0-J] Processor Failure (ACT side)
Replace STBY side related circuit cards
(CPU, GT, TSW, MUX, EMA) with a spare,
and check.
Replace the circuit cards (CPU, GT, TSW,
MUX, EMA) individually by referring to the
following paragraphs in Chapter 4:
• Section 1.3.1, CPR Replacement Procedure
• Section 1.3.2, EMA Card Replacement
Procedure
• Section 2.3.1, GT Card Replacement
Procedure
• Section 2.3.2, TSW Card Replacement
Procedure
• Section 3.3.2, MUX Card Replacement
Procedure
Place the circuit cards (CPU, GT, TSW, MUX)
into ACT mode by executing CPU changeover.
Refer to Section 12.1.6, Manual System
Changeover of Speech Path System, in Chapter
6.
Check to see if a station-to-station connection
can be set up to identify the circuit card
responsible for the fault.
When a fault is not indicated, set
the faulty systems to STBY side in
advance by executing CPU
changeover. Refer to Section 12,
System Control Procedures, in
Chapter 6.
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required
START
END